Gaseous-fluid compressor.



B. NAUER.

GASEOUS FLUID COMPRESSOR.

APPLICATION FILED 001224, 1910.

Patented Aug. 15, 1911.

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C2. CZJQ VW B. NAUER. GASEOUS FLUID COMPRESSOR.

APPLIQATION FILED 001'. 24, 1910.

Patented Aug. 15, 1911.

2 SHEETS-SHEET 2.

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ERNEST NAUER, OF CHICAGO, ILLINOIS.

GASEOUS-ELUID ooMrnEsso-n.

Specification of Letters latent.

PatentedAug. 15, 1911.

Application filed October 24, 1910. Serial No. 588,736,

- To all whom it may concern:

Be it known that I, ERNEST NAUER, a citizen of the United States, and a resident of ical construction and efficient in operation.

Other objects will appear hereinafter.

With these objects in view my invention consists in a geseous-fluid compressor characterized as above mentioned and in certain details of construction and arrangementsof parts all as will be hereinafter more any articula'rly pointed out in.

described and the appended c aims.

My-invention will be more readily under- I stood by reference to the accompanying, drawings forming a part of this specification and in which,

Figure 1 is a central section of a compressor embodying the preferred form of my invention, being a slight enlargement of a section taken on substantially line a2-a;

of Fig. 3 with the cylinders and pistons turned to the position shown by dotted lines in said figure, Fig. 2 is a transversesectional detail of the inner end portionof the cyl1nders and the parts communicating themewith,-showing. said,cylinders in the dotted line position in Fig. 3, and Fig. 3 is a transverse section slightly'reduced taken on substantially line y-@ of Fig. 1. I l

The preferred form 0 my invention as illustrated in the drawin comprisesa circular casing or shell 1 whlch is formed preferably integral with a base 2 so that in operation said casing -will be held stationary. Also formed integral with. said base 2 is an upwardly extending bearing bracket 3. One side of the casing l is open, the-same being closed by a head 4 which is tightly secured thereto by means of screws 5. 'Extending. eccentrically through the casing 1 is arhorizontal shaft 6, one end of the latter being mounted in the head 4 and fitted therein by a key 7, the opposite end of said shaft being supported. in the bracket 3 whereto the same is also secured against rotation by means of a set screw .8. Upon the first mentioned end of said shaft is threaded a collar 9 which rests against the outer end of the bearing portion of the head 4;, said collar being provided in order to prevent longitudinal movement of said shaft in one direca tion relative to the casing-1. A set screw 10 threaded. through the collar 9 serves as a means of locking the latter in any position of adjustment upon said shaft.

Arranged within the casing 1, the same being rotatably mounted upon the shaft ,6 is a circular cylinder-member 11 said member 11 is formed with an elongated bearing portion or hub 12 which projects through the stationary head of the casing 1, .a suitable packing 13 interposed between said head and hub serving an obvious purpose. The hub 12 is, as seen, of a'sectional nature, the inner or bearing portion 14 thereof which engages the shaft 6 being adapted to be detached so that when the same becomesworn it may be readily renewed or replaced at a very small expense. Set, screws 15 serve to hold said portion 14 in operative position and for rigidly securing the same to the body of the 'hub 12. With the arrangement disclosed it will be seen that in order to remove the member 14 1t is'only required to loosen the screws 15, since by so doin said portion 14 may be slid longitudinally rom engagement with said hub and from its position upon the shaft 6 afterremoval of the latter from its bearings. A collar. -16 threaded upon the shaft 6 adjacent the extremity of the hub 12 serves to maintain a constantly longitudinal release between said hub and shaft, a set screw 17 threaded into said nut serving '0 lock-the same in any position of adjustment.

Oil ducts 18 communicatingwith suitable oil cups,19 extended, as will be observed, to the various bearingsv serves to effect lubrication thereof when the device in operation.

Fixed u-fpon' the exteriorly projecting end portion 0 the hub 12 is a fly-wheel 20. Formed in the cylinder-membenll is a plurality of equally spaced radialv projecting cylinders 21 preferably four in number as shown. 'Recipr0cally mounted in the cylinders 21 are pistons-22 the outer extremities of which project beyond the periphery of said cylinders. Formed in the outer extremities of the pistons 22 are transversely extending channels 23 in which are mounted rollers 23', said rollers being free for rotary movement in said piston ends but held therein against movement longitudinally of said pistons.

Arranged within the casing 1 upon the 5 inner sides of the respective heads thereof adjacent the peripheries of said, heads are" annular hardened metal members 24, the latter being rigidly secured in position by means of dowel pins 25. Said annular 0 members 24 together with a hardened metal ring or-strip 26 arranged upon the inner side of the peripheral wall of the casing 1 form annular cam grooves eccentric with the axis of the shaft, 6 and hence the cylinder-memher 11. Said cam grooves are engaged by the respective extremities of the rollers 23 so that when thecylinder-member 11 and hence the pistons 22 are revolved reciprocatory movement relative to the cylinders 21 will be imparted to the pistons 22 due to the eccentricity of said cam grooves. The opposite sides of the pistons 22 adjacent the rings 24 are cut away asat 27 forming parallel flat sides which, when said pistons are revolved pass in'close proximity with adjacent edges of said members 24. This provision serves to prevent relative rotary movement of saidpistons serving to main-1' 'tain the proper positioning of the rollers 23 30 relative to the cam grooves engaged thereby.

.Formed in' the shaft 6 is a longitudinally extending passage way 28 which communlcates at ltSOlltQYGIid with a gaseous-fluidsupply pipe '29. The inner'end portion of said passage way 28 terminates in an'inlet port .28 positioned for communication with the inner ends of each of *the cylinders 21 when the cylinder-member 11 is rotated. Also'formed through the shaft 6-is a lon '-y 40 tudinally extending passageway 30 vt e -outer extremity ofwhich communicates with;

' a discharge or exhaust; pipe 31, The inner end portion of'said passage we 30 terminates in an exhaust port 30 w ich is also positioned for communication with each of the cylmders 21 as the cylinder-memberll is'rotated. Said portsfare so arranged, as

. will be observed by reference especiall to Figs; 2 and 3 that, with reference to each of,

the cylinders 21 that when the piston 22 carried thereby is at its'inner terminal of movement said cylinder-will be in [communication with} neither .of said ports. Upon' rotation of the member 11 in the direction shown by the arrow in Fig. 3 said cylinder will be brought to communicate with the port 28, remalning in communication with said port until the pistqn operating therein hasreached its outer terminal of movement whereupon communication with the inner end of said cylinder will be discontinued thereby imprisoning the gase ous-fluid drawn therein while in communication with the port 18. Said cylinder will -claims.

grooves; rollers 'at the outer ends of said 1 I remain QIOSQd through 90 ofmovement of the cylinder-member 11 whereupon the same will be brought into communication with the exhaust port 30. In this movement, however, of the member 11 the piston ofsaid cylinder will be forced inwardly causing the compression of the gaseous-fluid imprisoned in said cylinder and so that when the latter .is brought into communication with the port 30 as above mentioned the fluid discharged thereinto will be in a high state of compression as is desired. With the arrangement disclosed, it will be observed, that when the device is in operation, that is when thecylindermember 11 is rotated each of the cylinders will be brought successively into communication first with the intake port 18 where gaseousfluid will be supplied thereto and then to the discharge port 30 wherein fluid will be discharged in a state of compression.

In order to effect a tight connection: between the cylinder-member 11 and the shaft 6 the portion of the latter contacting with said cylinder-member in the vicinity of the cyli ders 21 is conically' formed, said port1on of said cylinder-member being corre spondingly formed. With this arrangement upon any wear of said surfaces the shaft 6, through the medium of the threaded collars-9 and 16 may be moved longitudinall in its bearings to take up such wear.

T e device as set forth is durable and economical, thesame is of hi h efliciency in operation and is not susceptible to readily becoming inoperative. v

While I-have shown what I deem to be the preferred form of my invention, I do not wish to be limited thereto as there might be various changesmade in the details of construction and arrangements of parts described Without departing from the spirit of my invention, and hencel desire to avail myself of suchfchanges and alterations as fairly fall within 'the scope of the appended Having described my "invention what I .deem as new and desire to secure by Letters Patent'is:

1. In a compressor, the combination of a circular casing; a plurality of cylinders in 'said'casing revolving in unlson about a common 'axls eccentnc with the axis of said casing; pistons mounted for reciprocation, within said cylinders; a hardened metal lining ring arranged upon the inner side of the peripheral wall of said casing; hardened metal shoulder rings secured to the innersides of said casing and, in conjunc tion with said lining rmg, forming cam pistons engaging said cam grooves; and lntake and exhaust ports arranged for communication with the innerendsof said cylinders, each of said cylinders being adapted upon rotation to be successively brought into communication with said ports, substantially as described.

2. In a compressor, the combination ofa circular casing; a plurality of cylinders in said casing revolving in unison about a common axis eccentric with the axis of said casing; pistons mounted for reciprocation within said cylinders; a hardened metal lin ing ring arranged upon the inner side of the peripheral wall of said casing; hardened metal shoulder rings secured to the inner sidesof'said casin and, in conjunction with said lining ring, orming cam grooves, .the sides of said pistons being flattened and bearing against the inner side faces of said shoulder rings; rollers at the outer ends of said pistons engaging said cam grooves; and intake and exhaust ports arranged for communication with the inner ends of said cylinders, each of said 0 linders being adapted upon rotation to successively brought into communication with said ports, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

1 ERNEST NAUER. Witnesses:

FLORENCE E. LILLIS, 7 Joanna R. H, Porrsi 

